multimedia/handbrake: include patches required for future ffmpeg8

OK: sthen@ kn@

multimedia/handbrake/patches/patch-libhb_audio_resample_c

@@ -0,0 +1,16 @@
+Index: libhb/audio_resample.c
+--- libhb/audio_resample.c.orig
++++ libhb/audio_resample.c
+@@ -90,10 +90,12 @@ static int is_mono(uint64_t layout)
+     int ii, channel_count;
+     int64_t mask;
+ 
++#ifdef AV_CH_LAYOUT_NATIVE
+     if (layout == AV_CH_LAYOUT_NATIVE)
+     {
+         return 0;
+     }
++#endif
+     for (ii = 0, channel_count = 0, mask = 1;
+          ii < 64 && channel_count < 2; ii++, mask <<= 1)
+     {